HarmonyOS AES/ECB/PKCS7Padding 加解密

参考demo：

export async function buildSignatureTest(): Promise<string> {
  let plantText = "SystemCapability.Security.CryptoFramework";
  let mac = cryptoFramework.createMac("SHA256");
  let symKeyGenerator = cryptoFramework.createSymKeyGenerator("HMAC");
  let key = symKeyGenerator.convertKey({ data: stringToUTF8Array("cryptoFrameworkcreateSymKeyGenerator1234") });
  return key.then((symKey) => {
    let promiseMacInit = mac.init(symKey);
    return promiseMacInit;
  }).then(() => {
    return mac.update({ data: new Uint8Array(buffer.from(plantText, 'utf-8').buffer) });
  }).then(() => {
    return mac.doFinal();
  }).then((output) => {
    return buffer.from(output.data).toString("base64")
  })
}
;

export function test() {
  buildSignatureTest().then((data) => {
    console.log("hmac test :" + data)
  }).catch((e: BusinessError) => {
    console.log("hmac test error:" + JSON.stringify(e))
  })
}

export function stringToUTF8Array(str: string) {
  return new Uint8Array(buffer.from(str, 'utf-8').buffer)
}
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